CN206099694U - Brushless permanent -magnet machine of external rotor - Google Patents
Brushless permanent -magnet machine of external rotor Download PDFInfo
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- CN206099694U CN206099694U CN201621080940.7U CN201621080940U CN206099694U CN 206099694 U CN206099694 U CN 206099694U CN 201621080940 U CN201621080940 U CN 201621080940U CN 206099694 U CN206099694 U CN 206099694U
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model provides a brushless permanent -magnet machine of external rotor, relates to motor technical field, and that solve is the technical problem who improves motor vibration and operation noise. This motor includes the rotor, and sets up the stator in the rotor, the inner wall of rotor is followed the circumference interval and has been laid a plurality of permanent magnetism magnetic poles, permanent magnetism magnetic pole edge part about the inboard is formed with the corner cut, be formed with a plurality of stator tooths on the stator, its characterized in that is laid along the circumference interval of stator to each stator tooth: each stator auxiliary tank about having seted up on the stator tooth to the left and right sides edge part of stator tooth is formed with the gear cutting point. The utility model provides a motor, vibration and operation small in noise that the operation in -process produced.
Description
Technical field
This utility model is related to motor technology, more particularly to a kind of technology of external rotor brushless magneto.
Background technology
Brushless PM synchronous motor has a small volume, efficiency high, simple structure, the advantages of manufacturing is strong, wherein outer rotor
Magneto is widely applied in blower fan, air conditioner.
In outer-rotor permanent magnet motor running, when the magnetic flux of rotor-side permanent magnet is coupled with stator teeth, due to tooth
Groove affects, and can produce cogging torque.And while effective torque is produced, can also produce radial electromagnetic force.These reasons
Will cause motor that vibration and running noises are produced in running.
As shown in figure 3, traditional outer-rotor permanent magnet motor is mainly made up of rotor 31 and the stator being arranged in rotor 31,
Multiple permanent magnetism magnetic poles 32 are laid with the inwall of rotor 31 is circumferentially spaced, the circumferentially-spaced cloth along stator is formed with stator
If multiple stator tooths 33.Traditional outer-rotor permanent magnet motor is improved all by the way of optimization rotor-side permanent magnetism magnetic pole shape
Cogging torque, so as to improve the situation of vibration and noise, such as implements corner cut to the permanent magnetism magnetic pole 32 of 31 side of rotor.It is this only according to
Mode by optimizing the permanent magnetism magnetic pole shape of rotor 31 side is relatively small to the improvement of cogging torque, vibration to motor and
The improvement of running noises not substantially yet, therefore traditional outer-rotor permanent magnet motor vibration and running noises it is all larger.
Utility model content
For defect present in above-mentioned prior art, technical problem to be solved in the utility model is to provide one kind and shakes
The little external rotor brushless magneto of dynamic and running noises.
In order to solve above-mentioned technical problem, a kind of external rotor brushless magneto provided by the utility model, including turning
Son, and the stator being arranged in rotor, the inwall of the rotor is circumferentially spaced to be laid with multiple permanent magnetism magnetic poles, the permanent-magnet magnetic
Pole is formed with corner cut in the left and right edges portion of inner side, and multiple stator tooths, week of each stator tooth along stator are formed with the stator
Lay to interval, it is characterised in that：Each stator auxiliary tank around, and the left and right of stator tooth are offered on the stator tooth
Both sides of the edge portion is formed with cutting point.
Further, if two stator auxiliary tanks to the corner between side be A1, two stator auxiliary tanks are dorsad
Corner between edge be A2, two corner cuts in the inner side left and right edges portion of permanent magnetism magnetic pole to the corner between side be B1,
Corner between the left and right sides of permanent magnetism magnetic pole is B2, the left and right cutting point of stator tooth to being C to the corner between side；Then
There is A1<B1<A2<C, and B2s of the B1 more than 0.5 times.
Further, the radial section of the stator auxiliary tank is curved.
Further, the radial section of the stator auxiliary tank is rectangular.
The external rotor brushless magneto that this utility model is provided, on the basis of rotor-side permanent magnetism magnetic pole corner cut, fixed
Stator auxiliary tank and cutting point structure are increased on sub- tooth, so as to optimize the cooperation of stator and rotor, back-emf can be improved humorous
Ripple content, cogging torque, torque ripple, radial force, so as to be effectively improved motor oscillating and running noises.
Description of the drawings
Fig. 1 is the structural representation of the external rotor brushless magneto of this utility model first embodiment；
Fig. 2 is the structural representation of the external rotor brushless magneto of this utility model second embodiment；
Fig. 3 is the structural representation of existing external rotor brushless magneto；
Fig. 4 is the external rotor brushless magneto and traditional external rotor brushless magneto of this utility model first embodiment
Back-emf harmonic contrast figure；
Fig. 5 is the external rotor brushless magneto and traditional external rotor brushless magneto of this utility model first embodiment
Cogging torque contrast；
Fig. 6 is the external rotor brushless magneto and traditional external rotor brushless magneto of this utility model first embodiment
Torque ripple comparison diagram；
Fig. 7 is the external rotor brushless magneto and traditional external rotor brushless magneto of this utility model first embodiment
Radial electromagnetic force comparison diagram.
Specific embodiment
Below in conjunction with description of the drawings embodiment of the present utility model is described in further detail, but the present embodiment and without
It is in this utility model is limited, every using analog structure of the present utility model and its similar change, this utility model all should be listed in
Protection domain, the pause mark in this utility model represents the relation of sum.
As shown in figure 1, a kind of external rotor brushless magneto that this utility model first embodiment is provided, including rotor
11, and the stator being arranged in rotor 11, the inwall of the rotor 11 is circumferentially spaced to be laid with multiple permanent magnetism magnetic poles 12, described
Permanent magnetism magnetic pole 12 is in inner side（It is inner side towards stator side）Left and right edges portion be formed with corner cut 121, on the stator formed
There are multiple stator tooths 13, circumferentially-spaced laying of each stator tooth 13 along stator, it is characterised in that：Offer on the stator tooth 13
The each stator auxiliary tank 131 in left and right, and the left and right sides edge part of stator tooth 13 is formed with cutting point；
If two stator auxiliary tanks 131 to the corner between side be A1, the dorsad edge of two stator auxiliary tanks 131
Between corner be A2, two corner cuts 121 in the inner side left and right edges portion of permanent magnetism magnetic pole to the corner between side be B1, forever
Corner between the left and right sides of magnetic magnetic pole 12 is B2, the left and right cutting point of stator tooth 13 to being C to the corner between side；
Then there is A1<B1<A2<C, and B2s of the B1 more than 0.5 times.
In this utility model first embodiment, the radial section of the stator auxiliary tank 131 is curved.
In this utility model first embodiment, the left and right sides edge part of stator tooth 13 is formed with cutting point and refers to stator tooth
The thickness of 13 left and right sides edge part along being gradually reduced towards the direction at edge, i.e.,：The thickness of stator tooth left edge portions from
Right-to-left is gradually reduced, and on the right of stator tooth, the thickness of edge is gradually reduced from left to right.
Fig. 4 is the external rotor brushless magneto and traditional external rotor brushless magneto of this utility model first embodiment
Back-emf harmonic contrast figure；Back-emf harmonic wave post line of the open tubular column line in Fig. 4 for this utility model first embodiment, it is solid
Post line is the back-emf harmonic wave post line of traditional external rotor brushless magneto；
Fig. 5 is the external rotor brushless magneto and traditional external rotor brushless magneto of this utility model first embodiment
Cogging torque contrast；Cogging torque curve of the dotted line in Fig. 5 for this utility model first embodiment, solid line turn for tradition is outer
The cogging torque curve of sub- brushless permanent magnet motor；
Fig. 6 is the external rotor brushless magneto and traditional external rotor brushless magneto of this utility model first embodiment
Torque ripple comparison diagram；Torque ripple curve of the dotted line in Fig. 6 for this utility model first embodiment, solid line are outer for tradition
The torque ripple curve of rotor brushless magneto；
Fig. 7 is the external rotor brushless magneto and traditional external rotor brushless magneto of this utility model first embodiment
Radial electromagnetic force comparison diagram；Radial direction force curve of the dotted line in Fig. 7 for this utility model first embodiment, solid line are outer for tradition
The radial direction force curve of rotor brushless magneto；
This utility model first embodiment is can be seen that from Fig. 4 to Fig. 7 and can be effectively improved back-emf harmonic content, teeth groove
Torque, torque ripple, radial force, so as to be effectively improved motor oscillating and running noises.
As shown in Fig. 2 this utility model second embodiment with the difference of first embodiment is：Determining in second embodiment
The radial section of sub- auxiliary tank 231 is rectangular.
Claims (4)
1. a kind of external rotor brushless magneto, including rotor, and the stator being arranged in rotor, the inwall of the rotor is along week
Multiple permanent magnetism magnetic poles are laid with to interval, the permanent magnetism magnetic pole is formed with corner cut in the left and right edges portion of inner side, on the stator
It is formed with multiple stator tooths, circumferentially-spaced laying of each stator tooth along stator, it is characterised in that：A left side is offered on the stator tooth
Right each stator auxiliary tank, and the left and right sides edge part of stator tooth is formed with cutting point.
2. external rotor brushless magneto according to claim 1, it is characterised in that：If two stator auxiliary tanks to
Corner between side is A1, and the corner dorsad between edge of two stator auxiliary tanks is A2, the inner side left and right side of permanent magnetism magnetic pole
Two corner cuts of edge to the corner between side be B1, the corner between the left and right sides of permanent magnetism magnetic pole be B2, stator
The left and right cutting point of tooth to being C to the corner between side；Then there is A1<B1<A2<C, and B2s of the B1 more than 0.5 times.
3. external rotor brushless magneto according to claim 1, it is characterised in that：The radial direction of the stator auxiliary tank is cut
Face is curved.
4. external rotor brushless magneto according to claim 1, it is characterised in that：The radial direction of the stator auxiliary tank is cut
Face is rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621080940.7U CN206099694U (en) | 2016-09-26 | 2016-09-26 | Brushless permanent -magnet machine of external rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621080940.7U CN206099694U (en) | 2016-09-26 | 2016-09-26 | Brushless permanent -magnet machine of external rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206099694U true CN206099694U (en) | 2017-04-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621080940.7U Active CN206099694U (en) | 2016-09-26 | 2016-09-26 | Brushless permanent -magnet machine of external rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206099694U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106385154A (en) * | 2016-09-26 | 2017-02-08 | 上海特波电机有限公司 | External rotor brushless permanent magnet motor |
| CN109936268A (en) * | 2019-04-29 | 2019-06-25 | 无锡市科迈电气有限公司 | Outer rotor brushless motor |
| CN112448496A (en) * | 2020-12-03 | 2021-03-05 | 江苏苏美达五金工具有限公司 | Stator punching sheet and low-cogging-torque permanent magnet brushless motor with same |
-
2016
- 2016-09-26 CN CN201621080940.7U patent/CN206099694U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106385154A (en) * | 2016-09-26 | 2017-02-08 | 上海特波电机有限公司 | External rotor brushless permanent magnet motor |
| CN109936268A (en) * | 2019-04-29 | 2019-06-25 | 无锡市科迈电气有限公司 | Outer rotor brushless motor |
| CN112448496A (en) * | 2020-12-03 | 2021-03-05 | 江苏苏美达五金工具有限公司 | Stator punching sheet and low-cogging-torque permanent magnet brushless motor with same |
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